2015年6月“第90届国际西方经济协会年会”（90th WEAI Annual Conference）在美国夏威夷举行。我中心曾辰航老师参加此次会议，并做了题为“A Note on Endogenous Heterogeneity in a Duopoly”的报告。

WEAI国际西方经济协会全称Western Economic Association International, 成立于1922年，是一个非营利性的学术机构，致力于鼓励和促进经济学研究的交流。会刊有 Economic Inquiry 和 Contemporary Economic Policy。

在此次高水平国际会议中，通过宣读论文，与其他与会者的交流，一方面展示了我中心老师的研究水平，另一方面中心老师也在交流中获得启发，并促进进一步合作研究的开展。

曾辰航博士所做报告论文摘要：

Abstract

This note extends the simultaneous-move endogenous technology choice model of Mills and Smith (1996) in two directions. First, expanding consideration to when the technology set is sufficiently convex, we find that the likelihood for asymmetric equilibrium in technology choice does not expand under simultaneous moves. Second, introducing sequential moves in the technology choice stage, we find that (i) if the technology set is insufficiently convex then the same amount of asymmetry is obtained as under simultaneous moves, (ii) if the technology set is sufficiently convex then sequential moves lead to more asymmetric technology choices, and (iii) the first mover always chooses a more efficient technology in any asymmetric equilibrium.

Key words:technology choice, endogenous heterogeneity, duopoly